Support RPMSCRIPT_FLAG_CRITICAL for posttrans

[Geass-LL]

Is your feature request related to a problem? Please describe.

When upgrading kernel, we will make initrd in posttrans script. But the process of making initrd may fail in some unusual situations, and we only get a warning message, the rpm command returns 0.

If the rpm command is running in a script, we will treat it as a successful kernel update by mistake, and then reboot. But becasuse the initrd wasn't successfully built, the reboot will enter emergency mode.

Describe the solution you'd like

Support some options to make posttrans script (can also be used in post, postun...) failure as RPMSCRIPT_FLAG_CRITICAL.

Describe alternatives you've considered

Add a new posttrans_critical, it supplies the same function as posttrans except the error of script is treated as critical.

[pmatilai]

The current behavior is a mistake really, and one that we'll be reverting in 6.0: #2581

[Geass-LL]

Thanks for your response. So can I just revert the related patches introduced in 4.6.0 for now? I'm worry that you might change some behaviors in 6.0 and it will be somewhat different from 4.6.0.